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JavaScript: Need for Speed

by Ariya Hidayat

Published April 11, 2013 in Technology


Analyzing the performance of large-scale JavaScript applications requires a distinct set of tools. It is no longer enough to run various benchmarks by creating loops and measuring the associated period. The amazing progress of modern JavaScript engines means that developers should not stress about outdated considerations such as cache array length, avoiding 'switch' statements and using 'while' instead of 'for'. Understanding the inner workings of the engine itself will reveal the typical code patterns favored for maximum execution speed (type stability, fixed object shape, profile-guided, garbage minimization, etc).

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